Opt

Opt has been an ever present card in many high tier Standard decks, including Mono Blue Tempo, Simic Flash, Jeskai Superfriends and Izzet Phoenix. This is a sign that Wizards want to keep evergreen cards like Shock and Opt in Standard to keep the relative power of decks stable.

Now that the card is safe from rotation, we can plan our theorycraft decks accordingly. Remember, as per Standard rotation rules, you can still use the Dominaria or Ixalan version of Opt in Standard decks if that is what you prefer.